Pneumatically-operated musical instrument.



J. P. EUSTIS & A, T. BROWN. PNEUMATICALLY OPERATED MUSICAL INSTRUMENT.

APPLICATION FILED MAYZY. '9'3. 1,221.,1 62.. I Patented Apr. 3, 1917 4 SHEETS-SHE ET I.

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L P EUSTIS &- A'. T. BROWN. PNEUMATCALLY OPERATED MUSICAI; INSTRUMENT. APPLICATION, FILED MAY 27. l9l3.

Patented Apr. 3-, 1917.

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J. P. EUSTIS & A. T. BROWN.

NEUMATICALLY OPERATED MUSICAL INSTRUMENT.

APPLICATION FILED mAYzr. 19x3.

1,221,]. 62. Patented Apr. 3, 1917.

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J. P. EUSTIS & A. T. BROWN. PNEUM'ATICALLY OPERATED MUSICAL INSTRUMENT.

APPLICATION FILED MAYZT. 19I3.

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Patented Apr. 3, 1917.

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nivrrnn STATES PATENT OFFICE.

JOHN P. EUSTIS, OF NEWTON, AND ALBERT T. BROWN, 01? ARLINGTON, MASSACHU- SETTS, ASSIGNORS TO J. 1?. EUSTIS MANUFACTURING COIVIIANY, OF BOSTON, MASSA- CHUSETTS, A CORPORATION OF MAINE.

PNEUMATICALLY-OPERATED MUSICAL INSTRUMENT.

Application filed May 27', 1913.

To all whom it may concern:

lie it known that we, Jenn P. EUSTIS and Anchor '1. *lnown, citizens of the United States of America, residing, respectively, at Newton, county of Middlesex, State of Massachuse ts, and Arlington, county of Middlesex, State of Massachusetts, have invented new and useful Improvements in Pncinnatically-Operated Musical Appara- 'tus, oil which the following is a specification.

This invention relates more particularly to pneumatically operated musical apparatus of the class in which the pneumatic mechanism is located within the piano case, although the invention is equally applicable to that class in which a separate case containing the actuating mechanism is moved up to the key board of the piano. In prior constructions the wind ch st and concomitant parts such as the end cheeks or boxes are of wood. and the tracker tubes are of rubber, but under the present invention these parts are preferably constructed of metal such as high sheet brass. Where the wind chest and checks are constructed of wood, the walls thereof are necessarily thick, and the necessary holes out into the wood are more or less rough. One of the objects of the pr invention is to construct the said pa ts oi sheet metal, with the result that the ag rcgate length of the wind passages is considerably reduced. as the holes are in thin metal and not in thick wood, and the metallic walls of the holes may be made smooth.

liher general objects or" the invention are Provide in the parts metallic lealoproof merous pasri s pass through thick wooden walls to increase to provide a construction which is not affected by atmospheric conditions, and to preclude the opening of the joints bet een the wind chest and end cheeks or other parts due to the sagging Off the wind chest, etc. Another or special object of the invention is to construct the wind chest and the end checks of metal in practically square form, whereby a substantially impeded column of air may pass through wind chest owing to the fact that little or uictional resistance thereto is offered by quare corners, inasmuch as they are re- Specification of Letters Patent.

Patented Apr. 3, 1917.

Serial No. 770,140.

moved although not remote from such column of air. Such square corners of course ol'l'er more resistance than the surfaces of the walls between them, and consequently the entire column of air in the wind-chest will move at substantially the same speed at points between said corners, while those portions of said entire column of air which are directly in said corners are retarded. Other objects of the invention will appear throughout the specification.

These being among the general objects of the invention, the same consists of certain features of construction and combinations of parts to be hereinafter described and then pointed out in the claims with reference to the accompanying drawings illustrating one desirable form of the invention, and in which Figure 1 is a. front elevation of parts of the piano case with the present improvements applied thereto;

Fig. 2 is an enlarged vertical section of one of the cheeks of the wind chest, taken on the line 22 Fig. 1;

Fig. 3 is a vertical section on the line 3*?) Fig. 2, showing other improved parts associated with said cheek;

Fig. 4 is a transverse section on the line l-l Fig. 2, showing clearly how one end of the wind chest is removably attached to the piano case;

Fig. 5 is a vertical section on the line Fig. 3;

Fig. 6 is a transverse section through the wind-chest, showi irts supported thereby such as the controlling valves, actuating pneumatics and tracker tubes;

Fig. 7 is a transverse section, with parts omitted, on the line 77 Fig. 1;

Fig. 8 is a vertical section through the other cheek of the wind-chest, taken in the plane of the wind-chest;

Fig. 9 is a vertical section on the line 99 Fig. 8, showing more particularly how the said check is secured to the piano case;

Fig. 10 is a sectional detail partly in elevation, showing how the strikers are guided;

Fig. 11 is a plan of the same parts;

Fig. 12 is a detail transverse section, showing how the sections of the tracker tubes are joined together and supported;

Fig. 13 is a plan of the same parts; and

Fig. 14 is a section on the line 1-1t1-t Fig. 1, showing how the metallic tubes are supported back of the music roll casing and how the same are connected with the tracker bar.

Referring to Figs. 1, 2 and 9, the piano case 10 is provided with a pipe 11 which supplies air to the foot exhaust bellows, and on the said case are supported a left-hand bracket 12 and a right-hand bracket 13. The bracket 13 is provided with an opening or chamber 1% to which the tension pipe 11 leads, and also with an opening or chamber 15 to which leads a pipe 16 connected with another pipe corresponding with pipe ll and with one of the expression pneumatics not shown, but well understood in mechanism of this description. A pipe 1'? leading to an opening or chamber 12 in bracket 12 is connected with another expression pneumatic. The said expression pneumatics in the illustrated form of the apparatus are intended to position the hammer rest rail.

The tracker bar 18 is mounted in the music roll case and frame 19, and a motor 20 and roll operating mechanism 21 are provided which may be controlled from governor 22.

There is an upper wind-chest 23 and a lower wind-chest which extend parallel with each other and are connected. with a left-hand cheek or box 25 and a right-hand cheek or box 26. There are also pneumatic valve units 27 mounted upon the upper wind-chest and pneumatic valve units 28 mounted upon the lower wind-chest, and these valve actions are adapted to actuate the striker pneumatics 29 and 30.

All the above described parts may be of any well-known or desirable construction, with the exception that the wind chest and end cheeks are preferably constructed in accmfdance with the present invention. Each wind-chest 28, 2% is preferably made of draw seamless metal tubing, and the cross section thereof is square or substantially so. The same also applies to the end cheeks or boxes 25, 26. Faeamless metal tubing is desirable although not absolutely necessary, but seamless tubing absolutely prevents any leakage throughout its length.

Referring more particularly to Figs. 2, 3, l. and 5, the cheek or end box 26 is provided at the wall. facing the wind-chests 23, with openings which are surrounded. by out- *ardly extending flanges or collars 31 struck up from the metal oil 5 ie cheek The interior dimensions of the collars 31 are just sullicient to take with a snug fit the end of the wind-chests or 2i to be applied thereto, the wind-chest one being inserted within the collar, whereupon bushings are applied from within the end cheek 26 to the ends of the wind-chests 23, 2%, and each of said bushings has an external flange 33} which seats upon the inner wall of the said check. The so described parts have in the first instance a snug fit, and solder is preterably applied to the said joints so that they are absolutely leak-proof. It will be seen that there are three thicknesses of metal at each oi these joints so that the wind chest and the said end cheek 26 are rigidily and substantially secured to each other. The said end cheek 26 rests upon the lower support of bracket 18, and the wall thereof which is applied next to the opening or chamber i l is provided with an opening which is surrounded by an annular flange which is struck up from the said wall and turned inwardly into the cheek, whereby the ed 'e of the opening in the said check is reinforced. is struck up from the upper end of the said box where the opening surrounded by said flange communicates with chamber 15 in bracket 123. Applied against the upper walls oi the end check or box 26 are flanged sleeves and through these pass with a snug fit an upper tube 37 which leads to the governor 22, while similar flanged sleeves 38 are applied to the walls below the sleeves 36,

and through these passes a lower tube 39' which also beds to the governor. The said tubes 37 and 39 serve to control the governor in a manner known in the art and may be soldered in position where they pass through the walls of said check, and likewise the said sleeves may be soldered in position, so as to provide a leak-proof joint. The upper end of the end cheek 26 is closed in part by a top plate 10 having an external depending flange atl, the form of which corr ponds to the inner cross-section of the said cheek plate so that the said flange may have a snug lit therein. There is also at this point a cap-plate 12 which is provided with an opening surrounded by a struck up annular flange 4-3, and the said cap-plate i2 is secured in position preferably by means of lugs 'l-l struck up from the inner plate 10. Between the plates 10 and -12 a sheet of packing material 15 is placed. At the top of the end cheek 26 a dome or spherial chamber at; with which is connected pipe 17 which leads to the governor. Mounted within the upper end of the cheek or end box 26 above the wind-chest 23 is an anchor plate 18 which is provided with an up-turned flange 4L9 which fits against and is suitably secured to the inside of the end cheek 26. Said plate 4 8 is provided with a central opening which receives a flanged bushing which is soldered therein and screw-threaded to receive the screw-threaded end of a stay-bolt 51, the head of which is drawn against the dome 16, whereby the parts are removably secured together so that access may be had to the inside of the upper end of the cheek 26. If desired, the said plates may be soldered in position. The soldering of bushing 50 provides an air-tight joint at this point, and prevents leakage to either side Likewise a similar flange 35' of the anchor-plate 18, which really constitutes a partition separating the cheek 26 into two compartments.

Means are provided for attaching the wind-chests 23 and 24 through the medium of end cheek 26 and concomitant parts to the corresponding end of the piano case. To this end, as more clearly shown in Fig. 4, the end cheek 26 is provided with a transverse tubular brace 53 which is of the same length as the distance between opposite walls of said cheek so that the ends of said brace will form butt joints with the said walls. The walls of the end cheek 26 opposite the open ends of the tubular brace 53 are provided with openings, which receive bushings 54 and 55 which are inserted through said openings and into the ends of the tubular brace 53, the fit being a snug one. The outer flanges of these bushings project over the outer walls of the said end cheeks, and through the said bushings passes a set screw 56 provided with a knurled head 57, the shank of said screw passing through the said tubular brace 53, and being provided with a screw-thread 58 so that the said set screw may have a screw connection with bracket 13. Under the knurled head 57 of the set screw is confined a packing ring 59. It will be seen that when these parts are screwed up tight, a perfectly air-tight joint connection is provided and that the said parts are firmly supported against and upon the bracket 13. The set screw 56 provides means for removably securing the described end of the windchest parts to the piano case. Preferably, a packing strip 60 is placed between the cheek 26 and the vertical wall of the bracket 13. The said end cheek 26 is furthermore provided with a bottom plate 61, flush with the lower edge of the said cheek and provided with an external struck up flange 62, which is tightly fitted into and soldered to the lower end of said cheek. A middle separator column 63 may connect the wind chest 23 with the wind chest 24 between the end cheeks 25, 26, and this column may be externally flanged and the flanges soldered to the walls of the wind-chest. It therefore acts as a support for the upper wind-chest.

At the left-hand ends of the wind-chests 23 and 241 is a cheek or end box 25 before mentioned, and its construction is more particularly shown in Figs. 8 and 9. Said check is provided with a top plate or cap 64 having an external flange 65 fitting into the upper end of the said cheek, and there is also a bottom plate or cap 66 likewise provided with an external flange 67 fitting into the lower end of the said check. The said plates 61 and 66 are of sheet metal and to the joints between the parts solder is applied, as is also the case of the corresponding plates for the right-hand cheek. A joint connecting each wind-chest 23 and 24 with the left-hand cheek 25 is provided which is the same as the joints connecting the right-hand cheek with the said wind-chest, the external flange or collar on the cheek 25 being indicated by 68 and the internal flanged bushing by 69, and thereby a three-ply construction similar to the construction of the corresponding joints at the right-hand end of the wind-chests is provided. The cylindrical portion 70 of bracket 12 and which contains chamber 12 is provided at its outer end with a screw neck 71, while the remote wall of the cheek 25 is provided with an opening 72 over which is applied a reinforcing cover-plate 73 which also has an opening into which and through said opening 72 a flanged bushing 74 is inserted. A set screw 75 is also pro vided, and this has a knurled head 76 so that when the shank of said screw is passed through the said bushing, the threaded end of the screw may be screwed into the neck 71 and the parts thereby tightly set. Under the head 76 of said screw is a packing ring '7 7, so that in connection with this packing ring, and the bushing 7% and the plate 73 which are soldered together and to the said check, a leak tight joint is provided. Between the cheek 25 and the vertical wall of bracket 12 a packing strip 78 is preferably placed to form an airtight joint, and this packing has an opening which registers with an opening 80 in the adjacent wall of said check, which opening 80 is surrounded by an in-turned annular flange 79, which reinforces the said wall of said cheek. By means of the set screw 75, the left-hand end of the described wind-chest structure is removably secured to the corresponding side of the piano case.

Referring to Figs. 1 and 6, the preferred tracker tube construction will now be described. In the illustrated embodiment of the invention two wind-chests are shown, in which case there are two sets of tracker tubes, namely 81 and 82. These tracker tubes connect in a well-known manner with the diaphragm chambers 83 of the valve action, 84 indicating the flexible diaphragms. The said tracker tubes are formed of metal tubing and their forward ends extend through openings in depending front flanges 85 and 86 respectively on the .upper and lower wind-chests. The said flanges extend lengthwise of the wind-chests and are preferably formed as depending portions of plates or metal strips which are soldered or brazed to the front walls of the wind chests, whereby the said wind-chests are reinforced and stiffened. It will be noted that by means of these depending flanges 85 and 86, the tracker tubes are located wholly outside of the wind-chests and do not pass therethrough, so that there can be no leakage in this connection. The tubes 81 and 82 have been designated tracker tubes but in reality in the preferred embodiment of the present in vention they constitute lower sections of the tracker tubes whichwill be fully described hereinafter. For supporting and fixing the upper ends of the tracker tube sections 81 and 82, juncture brackets 87 are provided, which are secured by screws or in any other suitable manner to an angle bracket 89 which is soldered or otherwise fixed to the back of the wind-chest. There are of course we of these brackets 89, because the pneumatics 29 and 30 are preferably supported on said brackets 89. Through the said brackets S9 and between the brackets 87 the 111- tallic tracke tube sections 82 pass, while tracker tube sections 81 pass through the lower bracket 89. Said brackets are also preferably constructed and bent up from sheet metal. It is obvious that when the upper ends of the tracker tube sections 81 and 82 are all secured to a plate 90, the parts mutually stifiened and braced. Carried by the brackets 8! is capstan guide plate 90 also preferably of sheet metal, and as shown more particularly in detail in Fig. 12, holes 91 are provided in capstan guide plate 90, into which the upper ends of the tracker tube sections 81 and 82 e inserted and in which plate 90 they may be soldered. Upposing the plate 90 is a supplemental juncture plate 92 provided with holes 93, which are arranged to register with the holes for the tracker tube sections 81 and 82, and into these holes 93 the ends of the other sections 94- of the metallic tracker tubes are inserted and soldered if desired. Located around the upper ends of the tracker tube sections 81 and 82 are flanged collars 95, and have a snug fit thereon, and which are soldered or otherwise secured to the nut erside of the guide plate 90. Likewise flanged collars 96 are snugly fitted about the lower ends of the upper tracker tube sections 9 1-, and these may be soldered or otherwise secured to the supplemental plate 92. Confined between the capstan guide-plate 90 and the supplemental plate 92 is a strip of packing mate rial 97 which is provided with holes which register with the adjacent ends of the tracker tube sections 81, 82 and 9 1. Screws 9? pass through the plates and packing and firmly unite the parts. this construction a suitable lcak-tight connection is provided between the low r sections of the tracker tubes and the upper sections, and a rigid construction is provided.

Referring to Fig. 1 1, it will be seen that the upper ends of the upper tracker tube sections 94: are anchored or fixed back of the music roll boX or casing 19, and said upper ends extend through the outwardly project ing flange of an angle plate or bracket 98 which is soldered or otherwise secured to the casing 19 and extends transverse thereof in a. position substantially parallel with the tracker 18. To the said plate 98 the upper ends of all of the tracker tubes, usually eighty-eight in number, converge. Preferably where the upper sections of the tracker tubes so closely lie together, solder is placed between rem so that a rigid construction is provided. Around the upper ends of the tracker tube sections 9 1, flanged collars 99 are placed and may be soldered thereon and to the angle plate 98. The upper ends of the metallic tracker tube sections 91 pro trude slightly above the angle plate 98 so as to furnish necks with which short rubber tube sections 100 are connected, which are in turn connected in a well-known manner to the tracker bar 18, so that atmospheric air admitted through the perforations in the perforated. music sheet will enter the tracker tubes and play the instrument.

Striker guide plate 90, Figs. 6 and 10, is provided with a number of openings extending parallel with the wind-chest, and in these openings are set metallic shells 101 or guides, and each of these shells is contracted at 102 wh re it is lined to the guide-plate 90, due to the fact that each shell flares from said intermediate point 102 toward both ends of the shell. These shells are preferably seamless, and are provided with soft felt or leather linings 103. Guided in the guide shells 101 are the strikers 104 which are connected in any suitable or well-known manner with the movable leaves or members of the actuating pneumatics 29 and 30 ll hen the parts of the described apparatus are in position, the upper ends of the strikers will be in contact with the undersides of the wippens 105 of the various hammer actions of the aiano.

The described actuating mechanism is as before explained, provided at each end with a set screw or other equivalent fastening device so that the said mechanism is secured at two points only to the piano case, and may be removed therefrom.

As shown in Figs. 1 and 7, the lower windchest 24 has applied thereto forks 111 downwardly from which extend forks 112. The forks 112 are bent outwardly so as to constitute feet so that when the described mechanism is removed from the piano case, the same may be supported upon any supporting surface by means of said feet, with sutli cient elevation to carry the mechanism out of contact with the supporting surface so that the said mechanism may be inspected, regulated and adjusted. as desired. Preferably the fork 111 and the fork 112 are formed from one metal casting.

A valuable feature of the present invention resides in maintaining a sullicient state of tension in the wind-chest and other passages of the mechanism. This is in part due to the metallic construction and in part to the nature of the joints between the various conducting elements of the mechanism,

which. joints are soldered, brazed or welded wherever desirable. This augments the permanency of atmospheric tension under varying climatic conditions and consequently standardizes the power upon which all tone color or musical expression depends. It is obvious that when the pumping pedal of a player-piano or equivalent musical instrument is depressed, the effect upon a note of the piano should be equivalent to the actual pounds pressure upon said pedal as though the latter were connected directly to the key by some mechanical means. In prior pneumatic instruments this is not true owing to leakage and the percolation of vacuum tension through packing and joints which necessarily must be made to be separable. To diminish the number of such joints in a player-piano augments the directness of the power exerted upon the pedal. Any loss in the vacuum tension thus produced through faulty joints in the air passages of the player-piano results in loss of power, loss of tone color and consequent loss of musical expression. Therefore, the result attained by the pneumatic instrument is made superior just in proportion as its vacuum tension can be conserved and just in proportion to the smallness of all the parts handling this vacuum tension, it being understood that the less atmosphere one has to stretch or bring up to the vacuum tension, the easier is the work of the operator and the less tiresome and irksome becomes the execution of the work. It will be seen from the above description of the present invention that while the mechanism is apparently compact and is relatively small as compared, to the old wooden structure, that the capacity of the air chambers or passages is relatively large, and this difference is considered to be material in the operation of the insstrument.

It is obvious that the present invention is susceptible of a wide range of modification, asparts may be omitted, parts added and parts substituted without departing from the general spirit and scope of the invention.

What we claim as new is:

1. In a pneumatically operated musical apparatus, a wind-chest structure of sheet metal, the same comprising a wind-chest and hollow end cheeks joined thereto, the opposing inner walls of said end cheeks having outdrawn flanges into which the ends of said wind-chest fit.

2. In a pneumatically operated musical apparatus, a wind-chest structure of sheet metal, the same comprising a wind-chest and hollow end cheeks joined thereto, the opposing inner walls of said end cheeks having flanges into which the ends of said windchest fit, and flanged bushings inserted into the ends of said wind-chest.

3. In a pneumatically operated musical apparatus, the combination with a windchest and hollow end cheeks, of a leak-tight and soldered joint between them, located at each end of said chest comprising three thicknesses, all of said parts of metal.

41-. In a pneumatically operated musical apparatus, a hollow metallic wind-chest check, and metallic flanged cap plates inserted in each end thereof and permanently joined air-tight thereto.

In a pneumatically operated musical apparatus, the combination with a hollow metallic wind-chest check, of a transverse tube the ends of which abut against the opposite inner walls of said cheek, and metallic bushings inserted in the ends of said tube and secured to the outer walls of said check.

6. In a pneumatically operated musical apparatus, the combination with a windchest and a hollow wind-chest cheek, of an inner anchorage plate constituting a partition in said check above said chest, a removable dome applied to said cheek above said partition, and a bolt from said dome removably applied to said anchorage plate.

7. In a pneumatically operated musical apparatus, the combination with a windchest and a hollow wind-chest cheek, of an inner anchorage plate constituting a partition in said cheek above said chest, a removable dome applied to said cheek above said partition, and a' bolt from said dome removably applied to said anchorage plate, all of said parts being of metal and, except for the said removable parts, being rigidly united as y soldering or brazing.

8. In a pneumatically operated musical apparatus, the combination with a windchest and a hollow wind-chest check, of an inner anchorage plate constituting a partition in said cheek above said chest, a removable dome applied to said cheek above said partition. :1 bolt from said dome removably applied to said anchorage plate, an air pipe connected with said cheek at a point above said partition or plate, and a second pipe connected with said dome.

9. In a pneumaticallv operated musical apparatus, the combination with a windchest and a hollow metallic wind-chest cheek, of an inner anchorage plate constituting a partition in said cheek above said chest and separating said cheek into two separate passageways, a cap plate applied to one end of said cheek, a dome thereon and a screw bolt connecting said anchorage plate and dome, whereby a detachable connection is provided.

10. In a pneumatically operated musical apparatus, the combination with a metallic wind-chest having a metallic flange permanently united to said chest along and in a plane parallel with one wall thereof as by brazing, of tracker tubes extending through said flange and thereby rigidly anchored to said chest.

11. in a pneumatically operated musical apparatus, the combination with a metallic wind-chest having a metallic reinforcing plate for one wall permanently united thereto along said wall as by brazing and providing' a flange projecting from said chest, oi tracker tubes supported by said flange.

12. In a pneumaticallv operated musical apparatus, the combination with a windchest and a. bent-up sheet metal bracket secured hereto and having a substantially horizontal flange, of a pneumatic supported from said flange so as to extend across said chest.

13. in a pneumatically operated musical apparatus, the combination of a wind-chest, a metallic bracket plate rigidly secured to but not constituting one wall thereof and extended beyond the adjacent wall, metallic tracker tubes extending through and anchored to said extension of said bracket plate, and valves on said chest to which said tubes lead.

14-. In a pneumatically operated musical apparatus, a metallic angle bracket, a me tallie bracket plate, said bracket and plate being permanently secured to opposite sides of said wind-chest as by brazing and extending beyond one wall of said wind-chest, metallic tracker tubes extending through and anchored to said bracket and plate, and valves on said chest to which said tubes lead.

15. In a pneumatically operated musical apparatus, the combination with tube supporting means, of sectional metallic tracker tubes supported by and having a juncture at said supporting means, said supporting and juncture means comprising a supporting plate, having holes into which the ends of some of said sections are secured, a supplemental plate having holes into which the ends of other of said sections are secured, means for packing the joint between said plates, sleeves secured by solder around said sections and to said plates, and fastening screws passing through the said plates and packing means.

16. In a pneumatically operated musical apparatus, means for supporting one end copies or this patent may be obtained for of a wind-chest, comprising a hollow cheek having alined openings in opposite walls, a tubular brace or greater diameter than said openings and having abutment at both ends against the said walls, a support, and a -fastening bolt extending through said cheek and brace and removably secured to said support.

17. In a pneumatically operated musical apparatus, means for supporting one end of a wind-chest, comprising a hollow cheek, having an opening in one wall, a plate or disk secured against the opposite wall, a bushing inserted in said plate, a support, and a removable fastening bolt passing through said bushing and opening and se cured to said support.

18. In a pneumatically operated musical apparatus, the combination of the case for the parts, and said parts, comprising awindchest, hollow upright end-cheeks connected with the said chest, a passage leading to one of said cheeks, means for detachably connecting the lower ends of said cheeks with said case and one of them with said passage, the said latter cheek having a transverse partition above said chest, a closure above said partition, a passage led in between said partition and closure, and a passage from the governor to said closure.

19. In a. pneumatically operated musical apparatus, the combination of the case for the parts, and said parts, comprising a windchest, hollow upright end-cheeks connected with the said chest, a passage leading to one of said cheeks, means for detachably connecting the lower ends of said cheeks with said case and one of them with said passage, the said latter cheek having atransverse partition above said chest, a removable hollow closure above said partition, a fastening connecting said closure with said partition, a passage led in between said partition and closure, and a passage from the governor to said closure.

JOHN P. EUSTIS. ALBERT T. BROWN. Witnesses:

THOMAS M. Knnrn,

F. A. COAN.

five cents each, by addressing the Commissioner or Eatents, Washington, D. U. 

